D 250 Pickup L6-359 5.9L DSL (1992)
Control Module: All Technical Service Bulletins
A/T - Lack of 3/4 Upshift and Deep Throttle 2/4 Upshift
NO.: 21-23-93
GROUP: Transmission
EFFECTIVE DATE: Sept. 3, 1993
SUBJECT:
Lack of 3/4 Up Shift and Deep Throttle 2/4 Up Shift
MODELS:
1992-1993 (AD) Ram Pickup/Ram Cab & Chassis
Power Ram Cab & Chassis
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH THE 5.9L CUMMINS DIESEL ENGINE AND AUTOMATIC TRANSMISSION.
SYMPTOM/CONDITION:
Customer complaints of a lack of 3/4 upshift at 50 to 60 miles per hour on the 1992 model year vehicles or complaints of a deep throttle 2/4 upshift on
the late built 1992 and 1993 models, could be related to the overdrive shift calibration.
DIAGNOSIS:
Using the Scan Tool (DRB II) and the applicable diagnostic procedure manual or the Mopar Diagnostic System, verify that the vehicle engine systems
are functioning as designed. If Trouble Codes (Diagnostic Trouble Codes) are present, record them on the repair order for future reference and repair as
necessary. If no codes are present and the systems are functioning as designed, proceed with the following repair.
PARTS REQUIRED:
1
Powertrain Control Module (SBEC)
4746568
1
Authorized Modification Label
4275086
REPAIR PROCEDURE:
This bulletin involves replacing the Powertrain Control Module (SBEC) with a revised module.
1.
Replace the Powertrain Control Module as outlined in the appropriate Rear Wheel Drive Truck Service Manual.
2.
Type the required information on the Authorized Modification Label, as Illustrated, and attach near the VECI label.
POLICY:
Reimbursable within the provisions of the warranty.